Aluminium oxide is impermeable and, unlike the oxide layers on many other metals, it adheres strongly to the parent metal. If damaged mechanically, aluminiumâs oxide layer repairs itself immediately.
Saliva helps remove oral waste and cavity-causing bacteria, protects teeth from decay by neutralizing harmful acids, and helps re-mineralize tooth enamel. Saliva also keeps oral tissues healthy by preventing infection by controlling bacteria and fungi in the mouth.
Plaque contains bacteria, which can contribute to tooth decay and gum disease. What is dental plaque? Plaque is a sticky substance made from leftover food particles and salvia that mix in your mouth. If you don't brush properly after meals, it begins to form and build up on your teeth. This is problematic because plaque contains bacteria, which can contribute to tooth decay and gum disease. In addition, dental plaque that remains on teeth for several days hardens and turns into a substance called tartar, which must be scraped off your teeth.